test-drb April 2003

test-drb@ccmp.vtda.org

272 participants
486 discussions

Wanted: TRS-80 PC-2 Pocket Computer Plotter pens

by Robert_Feldman＠jdedwards.com

Go back to the hobby shop and flip through some RC magazines to locate gear vendors (or just Google for them). Then send out some emails describing what you need. -----Original Message----- From: Ethan Dicks [mailto:erd_6502@yahoo.com] Sent: Thursday, April 17, 2003 9:20 AM To: cctalk(a)classiccmp.org Subject: Re: Wanted: TRS-80 PC-2 Pocket Computer Plotter pens <snip> What I could _really_ use is a source of the gear that fits directly on the X and Y motor shafts. I have tried going to local RC car and model train shops, but they don't carry gears. <snip>

21 years, 3 months

tape stuck in a TK70

by ClassicComputers＠bouncy-castle.demon.co.uk

How does one get a tape out of a TK70 when it doesn't want to let it go? Tried powering on / off a few times, hitting the unload button 3 or 4 times in quick succession etc. Wish the TK50 / TK70 QBUS controller cards had some firmware diagnostics that one could access, like retension tape, unload tape, etc... greg

21 years, 3 months

It's Alive! (HP 1000)

by rigdonj＠cfl.rr.com

Last night I cleaned up the HP 1000 that I picked up a couple of days ago and double-checked everything. Then I powered it up. It came up with no problems. Next I punched in some code into the front panel and run it. I spent three hours or more changing the program around, moving it to different memory locations, running it with different data, etc. Everything is working perfectly. The two broken switches haven't been a problem. I just poke my finger into the hole in the panel and press the contacts. Now I have to get busy and built a terminal cable and hook up hard drive. Joe

21 years, 3 months

(photos) of Northern Telecom (NT) DisplayPhone Plus NT6K90AC

by big_boy_toddy＠yahoo.com

Oh, and I also thought maybe some photos of the unitswould help folks see and realize what they are and enjoythe 'old stuff' and also the great shape these are in...http://sdo.dyndns.org/auctions/images/nt6k90/Thanks for being patient with me, this is my first, andhopefully last post to the group. These lovely classiccomputing devices need to find a friendly home.Todd Nathan The New Yahoo! Search - Faster. Easier. Bingo.

21 years, 3 months

HH drives

by aeg＠paradise.net.nz

Hi All I have a newbie question <collective groan from list> I don't have much experience with HH type drives and recently unearthed a Wyse Technologies machine at the local refuse recycling centre (it's a shop rather than me wading though a landfill site - I'm not that desperate). Inside this machine (stated built in 1986) were two HH type 5.25" hard drives (one a Segate ST-251 the other not branded but built 1989). On boot up I get: Pheonix 80386 ROM BIOS version 3.53 (c) 1985, 1986 Pheonix Technologies Ltd 640K Base 1408K Extended Memory Hard Disk Failure I have booted the system using a floppy and one drive (the unbranded one) is partially readable. It is a 41Mb drive split into two partitions (primary & extended) - FAT16 system It seems to have been installed with DRDOS. Using my later versions of DOS on floppy I cannot get the drive to respond to any standard commands (I always get a 'Sector not found' error). Can anything be done to revive these disks or were they left unparked and now physically damaged? I have another 5.25" hard drive displaying the same unresponsive characteristics... are they all dead? Thanks in advance Alan

21 years, 3 months

Looking for docs for the IC86 assembler

by vcf＠siconic.com

Does anyone have documentation for an 8086 assembler called IC86? There are some docs on the web but I'm trying to find a full set for someone I'm returning a favor to. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

21 years, 3 months

ASR33 reader

by charlesmorris＠direcway.com

OK now the light has finally come on. Thanks to all who provided different pieces of the puzzle. I had assumed that the PDP-8 turned on the reader, read in however many words from the tape reader it wanted, and then shut it off. It never occurred to me that DEC would toggle this line on every character read, let alone hard-wire this function, given the very slow speed of the tape compared to even a PDP-8! I suppose I could have figured this out by looking at the M706 schematic though... So I'll put a relay in my ASR33 but I'm don't think I'll wire the power switch connections, just the reader magnet path. I wouldn't be using the 8/L and TTY without both being turned on anyway, and only an SPST contact will be required. -Charles >From: Ethan Dicks <erd_6502(a)yahoo.com> >The KCC IOT (6032) clears the Reader Run flip-flop that drives >the buffer that activates the relay. >When the code running on the PDP-8 tells the console hardware to read a >byte from the console, the normal sequence of IOTs toggles the bit without >any extra programming required.

21 years, 3 months

Where can one find 2.5 inch floppy disks, and other odd sizes

by kurtk7＠visi.com

I know this is a strange request for help, but I have done a lot of searching for sources of odd sized floppy disks, and haven't had much luck. The 8" disks are not so much a problem, but from what I can tell, there were 2.0, 2.5, 2.8, 3.0, 3.25, and 4.0 inch formats and finding even one example has become a challenge for me. Since 3" disks were popular with the Sinclair systems, these can be had off Ebay, but what of the rest? Its a personal quest to one one copy of every type of removable media and if anyone has any ideas, sources, information, it would be most appreciated. I hope to post the collection to a website as I don't think it has been done. Thanks for any input Kurt (Still seeking a copy of the manual for the Jupiter Ace 4000, but I am hopeful as there is one possible source if I am lucky)

21 years, 3 months

Fluke pod

by Mhooks10＠cs.com

Joe, I was searching for a fluke pod for the 6502 processor and found a newsgroup post of yours. Did you ever find the 8088 pod you were looking for? I have one to trade or sell. Mark Hooks

21 years, 3 months

PCI cards available

by anheier＠owt.com

I have two recent pulls, functionality unknown: ATTO Express PCI PSC Single channel ultrawide SCSI-3 host adapter, $15 3Com Fast Etherlink XL PCI 10/100BASE TX, $10 prefer paypal, contact me off line Thanks Norm

21 years, 3 months

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test-drb April 2003